Kafka: deleting offset of a consumer group from a topic
After Kafka 2.8
Prevent storing huge transaction logs in Zookeeper
After some time of work Zookeeper writes a huge transaction log and adding any new event in the log makes fsync to FS very long Logs: To prevent size growth we can add two options to Zookeeper In config file: Or via Env variables when running in Docker This options will keep only last 7 days in the transaction log
Git: warning: Not a git repository
When you try to update/pull or get a diff for the Git repository, you can get a warning: It is because the new version of Git forbidden to run git commands in a directory that is not owned by the current user ( CVE-2022-24765 ) To fix, you need to change permission for the directory or set security options to git when running commands in CI/CD
Run CentOS 8 in rescue mode to change root password
In case you forgot the root password or can’t login to the CentOS, we can start OS by editing kernel boot options in Grub When the system is booting press any key (left, right, top, down) on Grub screen Select the kernel you need to run and press ‘e’ to open the editor
Debezium: getaddrinfo() thread failed to start
When building debezium-connect image on Gitlab runners had error After running all commands in Container found the problem Bug on Fedora issue tracker https://bugzilla.redhat.com/show_bug.cgi?id=2019901 Fix by running a container with security options or add config to Runner
Mongo WiredTiger Concurrency Tickets Available
If it’s not enough and the internal queue grows very fast – change the Wiredtiger limit of concurrent transaction
Can’t install nvidia/520.56.06 on Ubuntu 22.04
The newer version of the DKMS Nvidia driver won’t install on Ubuntu 22.04. From logs : Error “unrecognized command-line option ‘-ftrivial-auto-var-init=zero’ looks like we need a newer version of GCC. Firstly try to install deps
Clone secret path in Haspicorp Vault
Use an app named ‘safe’ URL: https://github.com/starkandwayne/safe/tree/v1.6.1
Hetzner VPS: filesystem partitions
Sometimes I need to have separate partitions on VPS in Hetzner. The simplest way to create a custom disk structure – use Cloud-init script With commands: In this example, we have 10Gb for / and empty disk /dev/sdb
Postgresql, count rows in all tables
For count rows in each PostgreSQL table, we need to create a function and run it for all schemas
i915 0000:00:02.0: Device initialization failed (-12)
After upgrading the kernel to a newer kernel, OS won’t boot with a stacked message